Single dried-out specimen. From top appeared to be a flat mushroom very close to the ground. No stem, in area where unlikely to be wood beneath the ground (very rocky). Underside seemed smoth, but this could be result of drying out.
This is all that's left of this powdery spored species once the spores have been dispersed. Earlier it would have been more-or-less spherical, with a thin skin surrounding a mass of powdery spores within a cotton-wool-like mass of fibres. the skin breaks away to expose the spores, thereby allowing breezes to carry them away. The whole spore mass is supported on a sterile and slightly spongy base, shaped a bit like an upside-down cone - and that base is what you see here.